CVE-2026-16787
Received Received - Intake

Stored XSS in Live Composer WordPress Plugin

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: Wordfence

Description
The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'dslc_custom_field' Shortcode in all versions up to, and including, 2.1.19 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-16787
EUVD
EUVD-2026-68975

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
live_composer free_wordpress_website_builder to 2.1.19 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the Live Composer WordPress plugin. It allows authenticated attackers with contributor-level access or higher to inject malicious scripts into web pages via the 'dslc_custom_field' shortcode. The issue arises from insufficient input sanitization and output escaping in versions up to 2.1.19.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Live Composer plugin for versions up to 2.1.19. Check for unauthorized scripts in pages via the 'dslc_custom_field' shortcode. Review contributor-level user activity logs for suspicious edits.

Impact Analysis

If exploited, this vulnerability could allow attackers to execute arbitrary web scripts in pages you visit. This may lead to theft of session cookies, account takeover, or defacement of your website. Users with contributor-level access or higher on your WordPress site could potentially inject malicious scripts.

Compliance Impact

This vulnerability could impact compliance by potentially exposing user data through script injection. GDPR may require breach notification if user data is compromised. HIPAA could be affected if protected health information is exposed. The risk depends on whether the injected scripts lead to unauthorized data access or modification.

Mitigation Strategies

Immediately update the Live Composer plugin to the latest version beyond 2.1.19. Remove or restrict contributor-level access to untrusted users. Scan websites for injected scripts and audit user roles and permissions.

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